Industrial VOCs treatment and recovery device

Abstract

The utility model relates to the technical field of environmental engineering, and discloses an industrial VOCs treatment and recovery device which comprises a mounting frame, a washing chamber and a filtering chamber are assembled in the middle of the mounting frame, a condensation chamber is assembled on one side, far away from the washing chamber, of the filtering chamber, a nitrogen tank is arranged on the outer side of the condensation chamber, and the nitrogen tank is communicated with the washing chamber. A nitrogen conveying pipe is assembled between the nitrogen tank and the condensation chamber, a nitrogen control assembly is arranged between the nitrogen tank and the condensation chamber, a first gas conveying pipe is arranged between the washing chamber and the filtering chamber, and a second gas conveying pipe is arranged between the filtering chamber and the condensation chamber. According to the utility model, through the structures of the nitrogen tank, the condensation chamber, the PLC, the temperature sensor, the pressure sensor, the nitrogen conveying pipe and the like, the recovery utilization rate and efficiency of a solvent are effectively improved, the resource waste and the environmental pollution are reduced, the cyclic utilization of resources is realized, and the improvement of the environmental protection property and the economical efficiency of the treatment and recovery device is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of environmental engineering technology, and in particular to an industrial VOCs treatment and recycling device. Background Technology

[0002] VOCs is the abbreviation for volatile organic compounds. It refers to various organic compounds with boiling points ranging from 50℃ to 260℃ at room temperature. In the industrial field, these compounds mainly come from industries such as chemical, coating, printing, electronics, and pharmaceutical.

[0003] Industrial VOCs treatment and recovery devices are mainly used to treat volatile organic compound waste gas generated during industrial production processes. Their purpose is to reduce the emission of these pollutants into the atmosphere, thereby improving air quality. The basic structure of an industrial VOCs treatment and recovery device mainly includes a pretreatment unit, an adsorption unit, and a post-treatment unit. The pretreatment unit filters and removes solid particulate matter from the intake air, the adsorption unit adsorbs VOCs through adsorbents (such as activated carbon), and the post-treatment unit further purifies the gas to ensure that the exhaust gas meets emission standards.

[0004] Existing industrial VOCs treatment and recovery devices typically use indirect heat exchangers, preventing direct contact between exhaust gas and the cooling medium. Heat is transferred through the heat exchanger walls, causing gaseous pollutants in the exhaust gas to condense. The cooling medium is usually water or air. While this method effectively recovers industrial VOCs through condensation, it has shortcomings. Because heat must cross the intermediate barrier of the heat exchanger walls, the thermal resistance is high, resulting in low heat transfer efficiency. This directly leads to a slow condensation process, significantly impacting treatment efficiency and hindering the achievement of the desired results. Improving condensation efficiency not only requires increasing the heat exchange area of ​​the equipment, thus occupying more space, but also prolongs the residence time of exhaust gas within the equipment, reducing the continuity and efficiency of the entire production process. Furthermore, considering the complexity of industrial exhaust gas composition, some highly volatile, low-boiling-point VOCs require stringent condensation conditions. The temperature range achievable by conventional water or air cooling media is insufficient to meet the demand for efficient condensation of these pollutants, weakening the overall purification capacity of the treatment and recovery device for industrial VOCs and hindering environmental quality improvement. Therefore, an industrial VOCs treatment and recovery device is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an industrial VOCs treatment and recovery device, which aims to improve the problems of low heat transfer efficiency, slow condensation process and low processing efficiency caused by the use of indirect heat exchangers combined with water or air cooling media in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An industrial VOCs treatment and recovery device includes a mounting frame. A washing chamber and a filtering chamber are assembled in the middle of the mounting frame. A condensing chamber is assembled on the side of the filtering chamber away from the washing chamber. A nitrogen tank is arranged on the outside of the condensing chamber. A nitrogen delivery pipe is assembled between the nitrogen tank and the condensing chamber. A nitrogen control component is arranged between the nitrogen tank and the condensing chamber. A first gas delivery pipe is arranged between the washing chamber and the filtering chamber. A second gas delivery pipe is arranged between the filtering chamber and the condensing chamber. A water tank is arranged on one side of the washing chamber. A water pump is assembled in the middle of the water tank. A spraying component is arranged inside the washing chamber. An air inlet pipe is assembled on the side of the washing chamber away from the filtering chamber. A nitrogen outlet pipe is assembled on the side of the condensing chamber away from the filtering chamber.

[0008] The nitrogen control assembly includes a solenoid valve, which is mounted on the outside of the nitrogen delivery pipe, and a PLC controller is provided on the side of the mounting frame away from the condensation chamber.

[0009] As a further description of the above technical solution:

[0010] The spraying assembly includes a mounting column, which is assembled inside the washing chamber. A rotating shaft is rotatably connected inside the mounting column, and a spraying pipe is fixedly connected to one end of the rotating shaft away from the mounting column.

[0011] As a further description of the above technical solution:

[0012] A temperature sensor and a pressure sensor are installed in the middle of the condensation chamber;

[0013] As a further description of the above technical solution:

[0014] The PLC controller is electrically connected to the solenoid valve, the temperature sensor, and the pressure sensor.

[0015] As a further description of the above technical solution:

[0016] A sewage tank is provided on the outside of the washing room, and an infusion pipe is installed between the washing room and the sewage tank.

[0017] As a further description of the above technical solution:

[0018] A solvent collection tank is provided on the outside of the condensation chamber, and a liquid delivery pipe is installed between the condensation chamber and the solvent collection tank;

[0019] As a further description of the above technical solution:

[0020] Multiple spray heads are evenly distributed in the middle of the spray pipe, and the mounting column is fixedly connected to the output end of the water pump.

[0021] As a further description of the above technical solution:

[0022] The spray head is rotatably connected to the interior of the washing chamber.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the flow rate of liquid nitrogen entering the condensation chamber is precisely adjusted by a nitrogen control component. Leveraging the ultra-low temperature characteristic of liquid nitrogen (-196℃), VOCs in the waste gas are deeply condensed, achieving efficient recovery of organic gases with low saturated vapor pressure that are difficult to recover. This greatly improves the solvent recovery rate and efficiency, reduces resource waste and environmental pollution. Simultaneously, the nitrogen gas after heat exchange is discharged from the nitrogen outlet pipe and can be directly applied to other industrial production processes, providing an inert environment for certain reactions, realizing resource recycling, improving the overall resource utilization efficiency of the entire industrial process, achieving environmentally friendly production, and contributing to enhancing the environmental friendliness and economic efficiency of the treatment and recovery device.

[0025] 2. In this utility model, a unique spraying structure driven by a high-pressure water flow provided by a water pump is used. The mounting column is fixed in the washing chamber, and one end of the rotating shaft inside the mounting column is connected to the spraying pipe. The spray heads evenly distributed on the pipe are driven by the high-pressure water flow, which causes the rotating shaft to rotate the spraying pipe. This process greatly expands the water spray range and significantly increases the mixing area with the exhaust gas. It can remove some VOCs and impurities in the exhaust gas more efficiently and comprehensively. Compared with the traditional simple spraying structure, it greatly improves the efficiency of spraying pretreatment and effectively reduces the burden on subsequent treatment stages. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of an industrial VOCs treatment and recycling device proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the gas transmission pipe of an industrial VOCs treatment and recovery device proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the spray head of an industrial VOCs treatment and recovery device proposed in this utility model.

[0029] Legend:

[0030] 1. Mounting frame; 2. Washing chamber; 3. Filtering chamber; 4. Condensation chamber; 5. Air inlet pipe; 6. Nitrogen outlet pipe; 7. Water tank; 8. Water pump; 9. Sewage tank; 10. Infusion pipe one; 11. Solvent collection tank; 12. Infusion pipe two; 13. Spraying assembly; 14. Mounting column; 15. Rotating shaft; 16. Spraying pipe; 17. Spray head; 18. Nitrogen tank; 19. Nitrogen delivery pipe; 20. Nitrogen control assembly; 21. Solenoid valve; 22. PLC controller; 23. Temperature sensor; 24. Pressure sensor; 25. Infusion pipe one; 26. Infusion pipe two. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 and Figure 2 An embodiment of this utility model provides an industrial VOCs treatment and recovery device, including a mounting frame 1. A washing chamber 2 and a filter chamber 3 are assembled in the middle of the mounting frame 1. A condensing chamber 4 is assembled on the side of the filter chamber 3 away from the washing chamber 2. A nitrogen tank 18 is arranged on the outside of the condensing chamber 4. A nitrogen delivery pipe 19 is assembled between the nitrogen tank 18 and the condensing chamber 4. A nitrogen control component 20 is arranged between the nitrogen tank 18 and the condensing chamber 4. A gas delivery pipe 25 is arranged between the washing chamber 2 and the filter chamber 3. A gas delivery pipe 26 is arranged between the filter chamber 3 and the condensing chamber 4. A water tank 7 is arranged on one side of the washing chamber 2. A water pump 8 is assembled in the middle of the water tank 7. A spraying component 13 is arranged inside the washing chamber 2. An air inlet pipe 5 is assembled on the side of the washing chamber 2 away from the filter chamber 3. A nitrogen outlet pipe 6 is assembled on the side of the condensing chamber 4 away from the filter chamber 3.

[0033] The nitrogen control assembly 20 includes a solenoid valve 21, which is mounted on the outside of the nitrogen delivery pipe 19. A PLC controller 22 is installed on the side of the mounting frame 1 away from the condenser chamber 4. A temperature sensor 23 and a pressure sensor 24 are installed in the middle of the condenser chamber 4. The PLC controller 22 is electrically connected to the solenoid valve 21, the temperature sensor 23, and the pressure sensor 24. A solvent collection tank 11 is installed on the outside of the condenser chamber 4. A liquid delivery pipe 22 is installed between the condenser chamber 4 and the solvent collection tank 11.

[0034] Under the control of the PLC controller 22 and via the solenoid valve 21, the nitrogen delivery volume and pressure are precisely and promptly adjusted based on real-time data from the temperature sensor 23 and pressure sensor 24 within the condensation chamber 4. During this operation, the low-temperature characteristics of liquid nitrogen are fully utilized, allowing VOCs in the waste gas to undergo deep condensation under efficient and stable conditions, transforming them into a liquid state. This significantly improves the condensation efficiency of VOCs. The condensed liquid VOCs flow smoothly into the solvent collection tank 11 via the liquid delivery pipe 12, achieving efficient recovery of industrial VOCs. This not only helps... In addition to reducing VOCs emissions into the atmosphere and improving air quality, the nitrogen gas can also be recycled and reused. The treated nitrogen gas is discharged through the nitrogen gas outlet pipe 6 and reused according to the actual needs of other industrial processes, realizing the recycling of resources and improving the comprehensive utilization rate of resources. The precise control of the PLC controller 22 can ensure the stability of the entire condensation process. In this process, the recycling of nitrogen gas not only reduces the dependence on external resources, but also reduces the environmental pressure of industrial production, which is in line with the concept of sustainable development and brings good environmental and economic benefits to enterprises.

[0035] Reference Figure 1 and Figure 3 The spraying assembly 13 includes a mounting column 14, which is assembled inside the washing chamber 2. A rotating shaft 15 is rotatably connected inside the mounting column 14. A spray pipe 16 is fixedly connected to one end of the rotating shaft 15 away from the mounting column 14. Multiple spray heads 17 are evenly distributed in the middle of the spray pipe 16. The mounting column 14 is fixedly connected to the output end of the water pump 8, and the spray heads 17 are rotatably connected inside the washing chamber 2.

[0036] Water is continuously pumped at high pressure by water pump 8 to the spray pipe 16 inside the scrubbing chamber 2. The water flows through the spray heads 17 evenly distributed on the spray pipe 16 and is sprayed out at high speed. During this process, the high-speed water jet generates a strong impact force. This impact force acts on the rotating shaft 15, which is fixedly connected to the spray pipe 16, causing it to rotate within the mounting column 14. This, in turn, drives the spray pipe 16 to perform a circular motion. This method expands the spray range in a fan shape, significantly increasing the mixing area with the industrial waste gas entering the scrubbing chamber 2. During the thorough mixing process, the water can come into more comprehensive and deep contact with VOCs and impurities in the waste gas. Through physical processes such as dissolution and adsorption, some VOCs and impurities are removed more effectively. The efficient operation of this spray structure greatly improves the pretreatment effect of industrial waste gas, reduces the burden on subsequent filtration in the filter chamber 3 and recycling in the condensation chamber 4, and effectively ensures the efficient and stable operation of the entire industrial VOCs treatment and recovery device.

[0037] Working principle: Industrial VOCs enter the scrubbing chamber 2 through the inlet pipe 5. The water pump 8 in the water tank 7 delivers water at high pressure to the spray pipe 16 in the scrubbing chamber 2. When the water flows through the spray nozzles 17 evenly distributed on the spray pipe 16 and sprays out at high speed, the impact force of the water flow causes the rotating shaft 15, which is fixedly connected to the spray pipe 16, to rotate in the mounting column 14, thereby allowing the spray pipe 16 to rotate. This expands the range of water spray and significantly increases the mixing area with the exhaust gas, enabling more thorough removal of some VOCs and impurities. The wastewater after scrubbing is discharged to the sewage tank 9 through the infusion pipe 10. Subsequently, the pre-treated exhaust gas enters the filter chamber 3 through the gas infusion pipe 25. The filter chamber 3 is used to further filter the exhaust gas and intercept residual impurity particles.

[0038] The filtered exhaust gas from filter chamber 3 enters condenser chamber 4 via gas delivery pipe 26. Nitrogen gas from nitrogen tank 18 is pressurized and enters condenser chamber 4 via nitrogen delivery pipe 19. It is precisely controlled by PLC controller 22 through solenoid valve 21 in nitrogen control component 20. PLC controller 22 adjusts the nitrogen delivery volume and delivery pressure in real time based on the data fed back by temperature sensor 23 and pressure sensor 24 in condenser chamber 4. Through the low temperature effect of liquid nitrogen, VOCs in exhaust gas are deeply condensed and converted into liquid. Liquid VOCs flow into solvent collection tank 11 through liquid delivery pipe 12, realizing efficient recovery of industrial VOCs. The treated nitrogen gas is discharged from nitrogen outlet pipe 6 and can be applied to other industrial processes according to actual needs, realizing resource recycling.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An industrial VOCs treatment and recovery device comprising a mounting frame (1), characterized in that: The middle part of the installation frame (1) is equipped with a washing chamber (2) and a filtering chamber (3), the side of the filtering chamber (3) away from the washing chamber (2) is equipped with a condensation chamber (4), the outer side of the condensation chamber (4) is provided with a nitrogen tank (18), the nitrogen tank (18) and the condensation chamber (4) are equipped with a nitrogen conveying pipe (19), the nitrogen tank (18) and the condensation chamber (4) are provided with a nitrogen control assembly (20), the washing chamber (2) and the filtering chamber (3) are provided with a gas conveying pipe one (25), the filtering chamber (3) and the condensation chamber (4) are provided with a gas conveying pipe two (26), one side of the washing chamber (2) is provided with a water tank (7), the middle part of the water tank (7) is equipped with a water pump (8), the inside of the washing chamber (2) is provided with a spraying assembly (13), the side of the washing chamber (2) away from the filtering chamber (3) is equipped with an air inlet pipe (5), the side of the condensation chamber (4) away from the filtering chamber (3) is equipped with a nitrogen outlet pipe (6). The nitrogen control assembly (20) comprises a solenoid valve (21), the solenoid valve (21) is equipped on the outer side of the nitrogen conveying pipe (19), the side of the installation frame (1) away from the condensation chamber (4) is provided with a PLC controller (22).

2. The industrial VOCs treatment and recovery device according to claim 1, characterized in that: The spraying assembly (13) comprises a mounting column (14), the mounting column (14) is equipped in the inside of the washing chamber (2), the inside of the mounting column (14) is rotatably connected with a rotating shaft (15), one end of the rotating shaft (15) away from the mounting column (14) is fixedly connected with a spraying pipe (16).

3. The industrial VOCs treatment and recovery device according to claim 1, characterized in that: The middle part of the condensation chamber (4) is provided with a temperature sensor (23) and a pressure sensor (24).

4. The industrial VOCs treatment and recovery device of claim 3, wherein: The PLC controller is electrically connected with the solenoid valve (21), the temperature sensor (23) and the pressure sensor (24).

5. The industrial VOCs treatment and recovery device of claim 1, wherein: The outer side of the washing chamber (2) is provided with a sewage tank (9), the washing chamber (2) and the sewage tank (9) are equipped with a liquid conveying pipe one (10).

6. The industrial VOCs treatment and recovery device of claim 1, wherein: The outer side of the condensation chamber (4) is provided with a solvent collecting tank (11), the condensation chamber (4) and the solvent collecting tank (11) are equipped with a liquid conveying pipe two (12).

7. The industrial VOCs treatment and recovery device of claim 2, wherein: The middle part of the spraying pipe (16) is uniformly distributed with a plurality of spraying heads (17), the mounting column (14) is fixedly connected with the output end of the water pump (8).

8. The industrial VOCs treatment and recovery device of claim 7, wherein: The spraying head (17) is rotatably connected in the inside of the washing chamber (2).

Images